At Thu, 29 Jun 2006 23:15:13 +0200, Gerhard Pircher wrote: > > > -------- Original-Nachricht -------- > Datum: Thu, 29 Jun 2006 11:27:15 +0200 > Von: Takashi Iwai <tiwai@xxxxxxx> > An: Gerhard Pircher <gerhard_pircher@xxxxxxx> > Betreff: Re: RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? > > > At Wed, 28 Jun 2006 22:27:53 +0200, > > Gerhard Pircher wrote: > > > > > > Hi, > > > > > > It took a little bit longer to integrate the patch, as I didn't figure > > out first how to implement the __dma_mmap_coherent() function for PPC > > systems with CONFIG_NOT_COHERENT_CACHE defined. :) > > > > > > Unfortunately my system still crashes within snd_pcm_mmap_data_nopage() > > > (sound/core/pcm_native.c), as you can see below. I guess it tries to > > remap > > > a DMA buffer allocated by the not cache coherent DMA memory allocation > > > function in arch/ppc/kernel/dma-mapping.c. > > > > Strange, nopage will be never called if you apply my patch and modify > > to use dma_mmap_coherent(). > > > > > > Takashi > > > That's indeed strange! I'm sure that the new code is called by the > sound drivers. Should snd_pcm_mmap_data_nopage() not be used at all > anymore, or are there any cases that could still trigger a call of > snd_pcm_mmap_data_nopage()? What is the type of buffer are you using? If it's a buffer pre-allocated via snd_pcm_lib_preallocate*() with SNDRV_DMA_TYPE_DEV, there should be no snd_pcm_mmap_data_nopage call. For other types, there can be. For example, the patch still doesn't solve the problems with drivers using sg-buffer. Takashi Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
